Typewriting machine



' July 16, 1 3 o. E. GATHMANN TYPEWRITING MACHINE Filed Dec. 12. 1 2 2 Sheets-Sheet 1 Patented July 16, 1935 UNITED STATESRPAITEI'NT OFFICE TYPEWBITING V Otto E. Gathmann, Syracuse, N. Y., assignor to L. C. Smith ,& Corona-Typewriters, Inc., New York, N. Y., a corporation of New York Application December 12, 1932, Serial No. 646,807

' 2 Claims. (01. 197-03) This invention relates to improvements in typewriting machines. g The principal objects of the invention are to provide simple and efficient margin regulating 5 mechanism for typewriting machines whereby rightward and leftward travel of the platen carriage may be arrested at desired margin determining limits and whereby, when desired, rightward or return travel of the carriage may be arrested at a desired intermediate point between the selected marginal limits for indenting, paragraphing and analogous typing operations; ,to provide-simple and effective indenting and left-hand margin stop mechanism settable by a control key to arrest return movement of the platen carriage at either a predetermined marginal limit or a predetermined limit for starting indented typing, paragraphs, like writing; and to provide normally effective means for arresting 20 return of the platen carriage at an intermediate point adapted to be locked out of action by a key in the keyboard for control of the carriage travel by margin regulating stop mechanism.

Other objects and advantages of the invention will appearfrom the following description of a preferred embodiment of the invention shown in the accompanying drawings illustrating an L. C. Smith typewriter modified in accordance with the present invention.

In the drawings:

Fig. 1 is a fragmentary side view of the machine, partly in vertical section;

Fig. 2 is a detail view showing the control key locked in depressed position;

Fig. 3 is a fragmentary front view of the ma chine showing the control key locked as in Fig. 2;

Fig. 4 is a fragmentary plan view of the regulating mechanism, the parts being conditioned as in Fig. 1;

Fig. 5 is a detail plan view showing arrest of rightward or return travelof the platen carriage by the indenting stop devices when the control key is positioned as in Fig. 1;

Fig. 6 is. a view similar to Fig. 5 showing arrest of rightward or return travel of the platencarriage by the left-hand margin-determining stop devices when the control key is held depressed by the typist, or is both depressed and locked down as in Figs. 2 and 3; and

Fig. 7 is a vertical transverse sectional view on the line 1- -1 cf Fig. 1. r

The machine has the usual main frame III with the usual transverse raceways l I and I2 for travel of the usual platen carriage 13 back and forth across the frame in :the usual manner on suitable ball bearings. As usual, the letter feed travel of the carriage under control of the usual escapement (not shown) is toward the left, and the return travel of the carriage is toward the right. The improved means for determining the limits of travel of the carriage will now be described.

A transverse rock shaft 30 is journalled on bearings 3| carried by a pair of fixed arms 32. Arms 32 extend downward and forward from a transverse frame bar 35 which is held by screws 36 on a pair of main frame standards 31, which standards also support raceway bar l2. Shaft 30 extends under a metal combined stop and supporting plate 33, which plate is horizontally dis- 15 posed and is riveted at 34 to frame bar 35 and extends forward over raceway bar I 2.

A controlling key lever ll, located in the keyboard of the machine adjacent the right hand side of the machine, is guided in the usual key M lever guide comb 15 held to its main frame and is fulcrumed on the usual key lever pivot rod Ii supported in the main frame. A return spring ll connected to the key lever l4 and frame ll! normally holds the key lever up against the usual 25 key lever stop bar device I8 on the main frame. A rearwardly extending arm I!) is pivoted at its forward end at on the main frame and is connected to key lever M by a. vertical link 2|. .A screw 22' on the rear end of arm I! extends hori- 30 zontally through a vertical closed slot 23 in the lower end of a vertical link 24, which link is pivoted at its upper end at 26 to a rock arm rigid with and extending rearward from shaft 30 ad-- jacent the righthand end of said shaft. Screw 5 22 is normally engaged in the lower end of slot 23.

Stop and supporting plate 33 is located about midway the sides of the machine frame, and a rock arm 54 fixed on shaft 3|! extends up through a clearance slot 55 in said plateand has its upper end pivotally engaged in an aperture 56"- in a stop controller or horizontally swinging arm Controller 55 extends tranvsersely of the machine and lies on-top of plate 33 to which it is pivoted at its left end on a vertical pivot screw 51 to swing fore-and-aft of the machine. Controller or arm 56 has forward of its pivot a pendent lug 58. Lug 58 is abutted by one end of a compression spring 58*, whose other end is housed in a suitable bore in the left hand edge of plate 33, to normallyyieldingly hold the controller 56 and connected parts positioned as shown in Figs. 1, 4 and '7. Forward swinging of the controller into normal position under pressure of spring 58 is limited by a headed stud 59 depending from the controller with its shank normally at the forward end of an arcuate slot 59' formed in plate 33.

A counter stop or frame stop 60 rests on top of controller 56 to which it is held by a vertical pivot 6|. Stop 60 has a forwardly extending abutment arm for coaction with a right hand margin determining stop hereinafter described which is mounted on the platen carriage. A second arm of said stop 60 extends toward the left of the machine from pivot 60; and a spring 63, which connects this 'arm with a pin 62 on controller 56, normally yieldingly holds the abutment arm of the stop 60 rocked to the left into (or substantially into) contact with an upstanding stop lug 64 on controller 56, as shown most clearly in Fig. 4.

A margin stop bar 65 extends transversely of the machine and is fixedly held to the platen carriage I3 to travel therewith, said bar being held by screws 12 to a pair of brackets 68 which in turn are fixedly held to the carriage adjacent opposite ends of the carriage by screws 69. Stop bar 65 has a letter space scale 60 on its front face,

and has notches 61 spaced a letter space distance apart along its lower edge. This stop bar extends, and moves with the carriage, in front of plate 33; and carries three adjustable carriage stops 21, 28 and 29 differing only as to their rearwardly extending abutment arms 21 28 and 29 with which the respective stops are provided. Each of these stops is slidably fitted on bar 65 for adjustment therealong and is locked in adjusted position by a spring-pressed plunger 38 having a pair of locking lugs 39 normally held drawn up in stop bar notches 61 by the plunger spring. Any other suitable form of adjustably mounted stop body may of course be employed.

Stop 21 determines the left hand margin, having a rearwardly extending rigid abutment arm 21 positioned to engage a leftwardly facing abutment shoulder 92 on plate like frame stop 33 for arresting return movement of the carriage at a desired marginal point. Stop 29 determines the right hand margin, having a rearwardly extending rigid abutment arm 29 positioned to pass above plate-like stop 33 into contact with the right hand edge of the abutment arm of frame stop 60 for arresting the letter feed advance of the carriage at the desired marginal point. In;- termediate stop 28 has a rearwardly extending rigid abutment arm 28 at the same level as arm 21'- but short enough to pass to the right of stop shoulder 92 on plate 33 into contact with the left hand side of the normally projecting forward end of a fore-and-aft slidable counter or frame stop 93, to arrest return movement of the carriage at a selected indenting or paragraph point to the right of the marginal point for which stop 21 is set. Arm 28 is lower than stop 60 and can pass thereunder when required.

Counter stop 93 for the adjustable indenting stop 28 is a bar-like member slidably fitted in a fore-and-aft extending slot 94 in plate-like counter stop 33, said stop 93 having upper and lower guide flanges 95 engaging the upper and lower faces of stop 33. Stop 93 is normally yieldably held projected forwardly in slot 94 in its effective position (as most clearly shown in Figs. 4 and 5) by a stop controller or arm 96 which extends toward the left under plate 33 from a vertical pivot 99 which pivotally holds arm 96 to plate 33. Stop 93 has a pendent stud 91 adjacent its rear end pivotally engaged in 2.

slightly transversely elongated pivot aperture 91 in the left hand end of controller arm 96 to permit stop 93 to be slid fore-and-aft in slot 94 by swinging movement of controller arm 96. Controller arm 96 is normally yieldingly held in the position shown, in Figs. 1, 4, 5 and '7 by a spring 99, which spring has one end housed in a suitable bore in the right hand edge of stop plate 33 and has its opposite end abutting an upstanding lug I00 formed on controller arm 96 forward of the arm pivot 98. Forward swinging of controller arm 96 by spring 99 is limited by engagement of a. pendent stop screw IN on stop plate 33 with the rear end of an arcuate slot I02 in the controller arm 95, as shown in Fig. 5. The head of screw IOI aids in supporting and guiding arm 96.

Controller 96, adjacent its left hand end and closely juxtaposed in plan between the forward ends of stops 93 and 60, has a cam nose I03 which normally projects forward of plate stop 33 in the path of travel of abutment arm 28 of indenting stop 28. Normally the forward ends of stop 93 and cam nose I03 lie in the same vertical transverse plane. Controller 96 extends across slot 59 in stop plate 33 into the path of travel of the head of stud 59 on controller 56 so that,'when controller 56 is rocked rearward into the position shown in Fig. 6 (by the depression of key lever I4 into the position shown in Figs. 2 and 3), said stud engages and rocks controller 96 rearward into the position shown in said Fig. 6.

When the controllers 56 and 96 are in rearwardly rocked position, the stop 93 and cam nose I03 are drawn rearward out of the path of travel of abutment arm 28 of indenting stop 28, so that the indenting stop is ineffective to arrest return movement of the platen carriage and so that said return movement of the carriage may continue until abutment arm 21 of the left hand margin controlling stop 21 engages stop shoulder 92 of fixed counter stop 33. While stop 60 is also withdrawn rearward, it is not withdrawn to ineffective position relatively to its coactive stop 29 whose abutment arm 29 is long enough to engage stop 60 in all fore-andraft adjusted positions of stop 60. Stop 60 is high enough not to interfere with the travel of abutment arm 28 of stop 28. The lengths of abutment arms I1 of stop 21 and 29 of stop 29 are such that neither of these arms can pass their counter stops under any condition or setting of the stop I mechanism. Abutment arm 28 of stop 28 is coactive with cam nose I03 to rock the interconnected controllers (through the medium of short slot I02 and stud IOI) far enough rearward to permit arm 28 to pass stop 93 from right to left if key lever I4 is restored to normal position with stop arm 28 passed to the right of its counter stop 93.

The key lever I4 is depressed to render the left hand margin stop devices effective and simultaneously render the indenting stop devices ineffective without rendering the right hand margin stop devices ineffective. For the above purposes key lever I4 is depressed until arrested by the horizontally extending lower arm 40 of a stop member 40, which stop member is rigidly secured to the main frame I0 at the front face of key lever guide comb I5 by suitable means such as the clamping screw 4|.

In order that key lever I4 may be retained in this depressed position as long as desired without the typist being required to hold the key lever 2,008,014 down, a locking key lever 42 is pivoted at its to normally hold a forwardly extending stop lug it on lever 42 engaged under stud 4i and to hold a second forwardly extending higher stop lug 49 on lever 42 spaced slightly above stud 45,, as

shown in Fig. 1.

Lever 42 has a rearwardly extending locking lug 50 provided at its rear end with a locking notch 5| in which the lower end of a pendent locking lug 52 on stop member 40 to the rear of lever 42 is adapted to automatically engage when lever I4 is depressed by its own key a. If lever i4 is depressed by pressing down on key 42 of locking lever 42, the locking lever will be rocked slightly forward until stop ing 49 engages stud t6, and keylever l4 will remain unlatched and will return to normal position as pressure is re-,

lieved on key 42. with lever l4 latched down as shown in Figs. 2 and 3, said lever may be released and restored to normal position at will by momentarily pressing down on key 42 and releasing said key 42. The lower part of lug 52 is forwardly oil'set slightly into the path of downward movement of the notched end of lug 50 when key l4 is depressed, so that lever 42 will be slightly cainmed forward and notch it will snap into engagement with the bottom edge of lug 52 at the end of the down stroke of lever l4 imparted by depressing key I4 The improved carriage stopping mechanism is useful for indenting the initial line of a; paragraph; for convenient typing of a plurality of lines of indented matter; filling in f rms; in typing matter in parallel columns w erein during typing one or more successive lines are typed in one column and then one or more following'lines are to be typedin the other column, and so on alternately; and for other analogous typing work.

What I claim is:

1. The combination in a typewriting machine having a main frame, a keyboard in the main frame, anda platen carriage which travels back and forth transversely of said frame, of left hand margin and indenting stops mounted on the carriage and adjustablethereon transversely of the main frame, a stop fixedly held to the main frame in the path of travel of the left hand margin stop to arrest return movement of the carriage,-

a shiftable stop supported by the main frame independently of the carriage and normally urged into the path of travel of the indenting stop, said.

indenting stop being supported on the carriage to pass said fixed stop,- a control key lever in the keyboard of the machinaand means connecting said control key lever and said shiftable stop for shifting said stop out of the path of travel of the indenting stop upon depression of said control key lever, a locking key lever carried by the control key'lever, and means on the main frame automatically engageable by said locking key lever to lock the control key lever depressed when the latter lever is depressed directly by its own key, said locking key lev'er being releasable from said means on the main frame by pressure on its own key and being operable by its own key to depress and release the control key lever without looking the latter lever in depressed position.

hand margin stops and an intermediate step traveling with the carriage, normally efi'ective' counter stops for said traveling stops, a control key on the main frame connected with the counter stop for the intermediate stop for shifting said counter stop out of the path of movement of the intermediate stop without rendering theremaining counter stops ineffective, and locking means for automatically locking said control key in actuated position when the control key is directly depressed, said locking means including a locking and release key connected with the control key and directly operable to release the control key from locked position and to acuate the control key without-locking the latter key.

O'I'I'O E. GATHJVIANN. 

